I'm not sure of the most appropriate place for this post so sorry if it needs to be moved.
I was thinking of buying the Tascam GT1 CD player/slowing down tool. I was looking at reviews and someone mentioned some software called 'Amazing Slow Downer'.
Had a look at it and it's great for working stuff out. Just timestretches both straight off a CD or mp3s etc. - MAC and PC version available.
Needless to say paying £25 for this is better than £150 for the Tascam (for me anyway).
Check it out if you're interested. link below.
Haydn
http://www.ronimusic.com